Hi, so after a very muddy ride, here's the results. It works, but could do with improving. Although no mud goes directly into the sensitive areas, quite a lot hits the seat and post, then falls down onto the shock. So I'll do another design iteration and see if it can be improved.
Got a muddy ride planned for tomorrow, so I'll report back soon. It doesn't make any rubbing noise, the two parts are only lightly touching each other.
Hi, I was inspired by the solutions on this thread, so designed a rear mudguard using laser cut 0.75mm polypropolene sheet. There are two parts, one for the top triangle and one for the bottom. As the rear triangle changes size, the two parts rub against each other, and not the frame.
Feel free...